Electrons added to atomic orbitals of the same energy will remain unpaired with

Question

Electrons added to atomic orbitals of the same energy will remain unpaired with parallel spins the subshell is more than half-filled is a statement of a. the afghan principle. b. Hund's rule. c. the Pauli exclusion principle d. the periodic law. e. the singularity rule. Select the correct electron configuration for duffer (Z = 16). a. 1s^21p^62s^22p^6 b. 1s^22s^2p^63x^2p^4 c. 1s^22s^22p^63s^23p^2 d. 1s^22s^22p^63s^23p^4 e. 1s^22s^22p^63s^23d^4 Select the correct electron configuration for Cu(Z = 29). a. [Ar]4s^23d^2 b. [Ar]4s^23d^0 c. [Ar]4s^24p^63d^3 d. [Ar]4s^24d^6 e. [Ar]5s^24d^2 Which of the following elements has the smallest atomic size? a. Na b. Rb c. K d. Li e. Cs Which of the following elements has the greatest atomic radius? a. F b. CI c. I d. Br e. Ar

Explanation / Answer

43) option B is correct

44) atomic number is 16 so the electron configuration is 1s2 2s2 2p6 3s2 3p4 .option B is correct

45) atomic number is 29 so the electron configuration is [Ar]4s1 3d10

46) Li has the smallest atomic size. In groups as we move from top to bottom atomic size increasses and in periods as we move from left to right atomic size decreases.

47) option E is correct

In groups as we move from top to bottom atomic size increasses and in periods as we move from left to right atomic size decreases.

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